Is a tire pressure of 2.8 too high in summer?

[BrooklynLee]

Summer tire pressure of 2.8 is high. Normally, the tire pressure value between 2.3 and 2.5 is considered normal. For daily driving, there is no need for such high tire pressure because excessively high tire pressure can affect the tire's friction, adhesion, and braking performance, as well as reduce the tire's service life. It is recommended to adjust the tire pressure to 2.5. Neither too high nor too low tire pressure is good; high pressure increases the risk of tire blowouts, while low pressure can damage the tires. Therefore, it is advisable to maintain the standard tire pressure as required by the manufacturer. In addition to judging whether the tire pressure is normal by observing tire wear, it is best to walk around the car and check the air pressure of all four tires before driving. A tire pressure gauge can also be used for measurement.

[MacGia]

This tire pressure is indeed a bit high for summer. I just helped my neighbor check his SUV and it was the same situation. Generally, the recommended range marked on the door frame or manual is between 2.3 and 2.5. In summer, road temperatures can easily reach 50-60 degrees Celsius, and the air inside the tires expands as you drive. If the cold tire pressure is 2.8, it can soar above 3.0 after half an hour of driving. Excessive tire pressure is like giving your tires steroids—the center tread will wear out prematurely, reducing grip, especially making braking slippery on rainy days. I prefer measuring with a tire gauge in the early morning before driving and setting it about 0.1 below the standard value. This makes the ride both stable and comfortable. Keeping a portable inflator in the trunk is very practical.

[VanLucas]

The tire pressure is indeed a bit high in summer. Last week, I encountered a similar issue when driving my child to school. The normal cold tire pressure for a sedan should be between 2.2 and 2.5, while 2.8 means the tire is like an overinflated balloon. When driving in hot weather, the internal tire pressure will continue to rise, reducing the contact area and leading to poorer handling. What's more troublesome is that long-term overinflation causes uneven tire wear, with the middle of the tread wearing out much faster than the sides. Replacing a new tire could cost you an extra seven or eight hundred yuan. It's recommended to check the tire pressure before driving in the morning. If your car has a tire pressure monitoring system, pay extra attention to any warning alerts and adjust the pressure to the standard value promptly—it's both safer and more cost-effective.

[McBentley]

A tire pressure of 2.8 in summer is indeed on the high side, with the standard value usually clearly indicated on the door label. The principle of thermal expansion and contraction is particularly noticeable in summer, where a cold-state pressure of 2.8 can exceed 3.0 after just twenty minutes of driving. Excessive tire pressure causes the tire to bulge, leading to excessive wear in the central area and a reduction in grip performance by about one-fifth. It also increases the risk of a blowout, especially at high speeds. I typically check my tire pressure once a month and intentionally keep it 0.2 lower in summer than in winter, which also provides better stability during heavy rain.